@amcharts/amcharts5
Version:
amCharts 5
60 lines • 2.16 kB
JavaScript
import { OverboughtOversold } from "./OverboughtOversold";
/**
* An implementation of a [[StockChart]] indicator.
*
* @see {@link https://www.amcharts.com/docs/v5/charts/stock/indicators/} for more info
*/
export class CommodityChannelIndex extends OverboughtOversold {
_afterNew() {
this._themeTags.push("commoditychannelindex");
super._afterNew();
this._editableSettings.unshift({
key: "period",
name: this.root.language.translateAny("Period"),
type: "number"
}, {
key: "seriesColor",
name: this.root.language.translateAny("Period"),
type: "color"
});
}
/**
* @ignore
*/
prepareData() {
if (this.series) {
const dataItems = this.get("stockSeries").dataItems;
let data = this._getTypicalPrice(dataItems);
let period = this.get("period", 20);
this._sma(data, period, "value_y", "sma");
for (let i = 0, len = data.length; i < len; i++) {
const dataItem = data[i];
const value = dataItem.value_y;
let ma = dataItem.sma;
let meanDeviation = 0;
if (i >= period - 1) {
for (let j = i; j > i - period; j--) {
let di = data[j];
meanDeviation += Math.abs(di.value_y - ma);
}
meanDeviation = meanDeviation / period;
dataItem.valueS = (value - ma) / (0.015 * meanDeviation);
}
}
this.series.data.setAll(data);
}
}
}
Object.defineProperty(CommodityChannelIndex, "className", {
enumerable: true,
configurable: true,
writable: true,
value: "CommodityChannelIndex"
});
Object.defineProperty(CommodityChannelIndex, "classNames", {
enumerable: true,
configurable: true,
writable: true,
value: OverboughtOversold.classNames.concat([CommodityChannelIndex.className])
});
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